Antigravity "Drop-in" Lifepo4 Lithium Batteries for BMW - Save 43lbs!

tom @ eas · 04-19-2022, 12:35 PM

Quote:

Originally Posted by Envyscorpio

Can they be charged using traditional trickle charger?

No, you should use a charger specifically compatible with Lifepo4 batteries. The CTEK chargers are popular and the same BMW offers.

Signature Wheel BMW · 04-25-2022, 11:30 AM

Alright, I might have to bite the bullet and get one. When my tank is 1/2 full vs full, there's a 50-60LB difference. Car is way more nimble when the tank is 1/2 full, making me faster around corners. I now understand why people are doing these.

Since I daily mine, do you recommend 60mah so there's no sacrifice in performance at all? Or is 40mah still the go-to for all around cost and performance. Car is garaged kept, don't drive under 50 degrees. I use a NOCO 5 to maintain, which also works on LIPO.

The only people who have issues with AG are the ones running the very tiny motorsport ones that barely has enough power to crank over. Mostly user errors is what I've learned, forget to unplug something or leaving the key in the ignition overnight.

DRLane · 04-25-2022, 11:39 AM

Quote:

Originally Posted by Signature Wheel BMW

Alright, I might have to bite the bullet and get one. When my tank is 1/2 full vs full, there's a 50-60LB difference. Car is way more nimble when the tank is 1/2 full, making me faster around corners. I now understand why people are doing these.

Since I daily mine, do you recommend 60mah so there's no sacrifice in performance at all? Or is 40mah still the go-to for all around cost and performance. The only people who have issues are the ones running the very tiny motorsport ones that barely has enough power to crank over.

I'm running 24Ah with zero issues for past 12 months. Drive exclusively track & to/from. Car sits on trickle when garaged.

tom @ eas · 04-25-2022, 08:06 PM

Quote:

Originally Posted by Signature Wheel BMW

Alright, I might have to bite the bullet and get one. When my tank is 1/2 full vs full, there's a 50-60LB difference. Car is way more nimble when the tank is 1/2 full, making me faster around corners. I now understand why people are doing these.

Since I daily mine, do you recommend 60mah so there's no sacrifice in performance at all? Or is 40mah still the go-to for all around cost and performance. Car is garaged kept, don't drive under 50 degrees. I use a NOCO 5 to maintain, which also works on LIPO.

The only people who have issues with AG are the ones running the very tiny motorsport ones that barely has enough power to crank over. Mostly user errors is what I've learned, forget to unplug something or leaving the key in the ignition overnight.

I would always run the 60Ah if possible.

bobbert · 02-03-2023, 10:53 PM

What type of operation would warrant the 80Ah (group 49/H8)? I daily my E90M (including seasonal sub-freezing if not snowing) and am planning on the 60Ah/H8.

tom @ eas · 02-04-2023, 03:51 PM

Quote:

Originally Posted by bobbert

What type of operation would warrant the 80Ah (group 49/H8)? I daily my E90M (including seasonal sub-freezing if not snowing) and am planning on the 60Ah/H8.

Should be using a H7 on E9X Chassis, but we have 80AH available:

https://europeanautosource.com/colle...44437254930754

happydude · 02-11-2023, 11:23 AM

When charging with a Lifepo4 charger, do you attach directly to the battery? Or use the under the hood connections?

tom @ eas · 02-11-2023, 01:42 PM

Quote:

Originally Posted by happydude

When charging with a Lifepo4 charger, do you attach directly to the battery? Or use the under the hood connections?

Either is fine.

e92BMW///M3 · 06-09-2023, 12:35 PM

Quote:

Originally Posted by tom @ eas

I would always run the 60Ah if possible.

What makes you say this? (Not questioning, just looking for more background on why) I need a new battery and am contemplating one of these. Most of my driving is to/from the track with the occasional weekend trips around town. Could/would be plugged into a trickle charger otherwise. Considering that use case would the 60 still be preferred?

tom @ eas · 06-09-2023, 01:04 PM

Quote:

Originally Posted by e92BMW///M3

What makes you say this? (Not questioning, just looking for more background on why) I need a new battery and am contemplating one of these. Most of my driving is to/from the track with the occasional weekend trips around town. Could/would be plugged into a trickle charger otherwise. Considering that use case would the 60 still be preferred?

There's no need for all that with a 60A. only a ~$100/3lb difference between the two.

Some have no problem running a 40A. May not be an issue when the battery is brand new, but the smaller CCA may be an issue later down the road after the cells age, the peace of mind with a higher CCA is worth it for me.

e92BMW///M3 · 06-09-2023, 02:41 PM

Quote:

Originally Posted by tom @ eas

There's no need for all that with a 60A. only a ~$100/3lb difference between the two.

Some have no problem running a 40A. May not be an issue when the battery is brand new, but the smaller CCA may be an issue later down the road after the cells age, the peace of mind with a higher CCA is worth it for me.

Makes sense. I’m not looking to save $100 and 3 lbs if it means having issues after a few years. Appreciate the feedback.

sterile stork · 06-12-2023, 11:11 AM

Quote:

Originally Posted by tom @ eas

Should be using a H7 on E9X Chassis, but we have 80AH available:

https://europeanautosource.com/colle...44437254930754

When do you recommend 80AH on E9X M cars?

tom @ eas · 06-12-2023, 01:13 PM

Quote:

Originally Posted by sterile stork

When do you recommend 80AH on E9X M cars?

Typically, this is needed for colder climates on cold start, but it never hurts to have additional CCAs.

Grippinaround · 11-05-2023, 05:10 PM

Quote:

Originally Posted by DRLane

I'm running 24Ah with zero issues for past 12 months. Drive exclusively track & to/from. Car sits on trickle when garaged.

What did you code your 24ah battery as? Did you use bimmercode and bimmerlink?

04-25-2022, 11:30 AM	#46
Signature Wheel BMW Major 1104 Rep 1,083 Posts Drives: Signature BMW Join Date: Sep 2016 Location: IG: signature_bmw iTrader: (0)	Alright, I might have to bite the bullet and get one. When my tank is 1/2 full vs full, there's a 50-60LB difference. Car is way more nimble when the tank is 1/2 full, making me faster around corners. I now understand why people are doing these. Since I daily mine, do you recommend 60mah so there's no sacrifice in performance at all? Or is 40mah still the go-to for all around cost and performance. Car is garaged kept, don't drive under 50 degrees. I use a NOCO 5 to maintain, which also works on LIPO. The only people who have issues with AG are the ones running the very tiny motorsport ones that barely has enough power to crank over. Mostly user errors is what I've learned, forget to unplug something or leaving the key in the ignition overnight. Attached Images Last edited by Signature Wheel BMW; 04-25-2022 at 11:42 AM..
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02-03-2023, 10:53 PM	#49
bobbert Enlisted Member 27 Rep 32 Posts Drives: E90 M3 Melbourne Red Join Date: Jan 2019 Location: Seattle, WA iTrader: (0)	What type of operation would warrant the 80Ah (group 49/H8)? I daily my E90M (including seasonal sub-freezing if not snowing) and am planning on the 60Ah/H8.
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02-11-2023, 11:23 AM	#51
happydude Second Lieutenant 137 Rep 234 Posts Drives: E92 M3 / F15 X5 35d Join Date: Oct 2018 Location: TX iTrader: (0)	When charging with a Lifepo4 charger, do you attach directly to the battery? Or use the under the hood connections?
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